From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
intel-gfx@lists.freedesktop.org, kernel-janitors@vger.kernel.org,
dri-devel@lists.freedesktop.org
Subject: Re: [patch] drm/i915: precedence bug in hsw_compute_wm_results()
Date: Fri, 09 Aug 2013 10:04:34 +0000 [thread overview]
Message-ID: <20130809100434.GC5004@intel.com> (raw)
In-Reply-To: <20130809094302.GA29282@elgon.mountain>
On Fri, Aug 09, 2013 at 12:43:02PM +0300, Dan Carpenter wrote:
> The '!' operation has higher precedence than the compare so probably
> this test is never true.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index a5a9959..0b9d9a7 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -2562,7 +2562,7 @@ static void hsw_compute_wm_results(struct drm_device *dev,
> * a WM level. */
> results->enable_fbc_wm = true;
> for (level = 1; level <= max_level; level++) {
> - if (!lp_results[level - 1].fbc_val > lp_maximums->fbc) {
> + if (lp_results[level - 1].fbc_val <= lp_maximums->fbc) {
Whoops. My bad.
It should still be > but ! should just be dropped.
> results->enable_fbc_wm = false;
> lp_results[level - 1].fbc_val = 0;
> }
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Ville Syrjälä
Intel OTC
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WARNING: multiple messages have this Message-ID (diff)
From: "Ville Syrjälä" <ville.syrjala@linux.intel.com>
To: Dan Carpenter <dan.carpenter@oracle.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>,
intel-gfx@lists.freedesktop.org, kernel-janitors@vger.kernel.org,
dri-devel@lists.freedesktop.org
Subject: Re: [patch] drm/i915: precedence bug in hsw_compute_wm_results()
Date: Fri, 9 Aug 2013 13:04:34 +0300 [thread overview]
Message-ID: <20130809100434.GC5004@intel.com> (raw)
In-Reply-To: <20130809094302.GA29282@elgon.mountain>
On Fri, Aug 09, 2013 at 12:43:02PM +0300, Dan Carpenter wrote:
> The '!' operation has higher precedence than the compare so probably
> this test is never true.
>
> Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
>
> diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
> index a5a9959..0b9d9a7 100644
> --- a/drivers/gpu/drm/i915/intel_pm.c
> +++ b/drivers/gpu/drm/i915/intel_pm.c
> @@ -2562,7 +2562,7 @@ static void hsw_compute_wm_results(struct drm_device *dev,
> * a WM level. */
> results->enable_fbc_wm = true;
> for (level = 1; level <= max_level; level++) {
> - if (!lp_results[level - 1].fbc_val > lp_maximums->fbc) {
> + if (lp_results[level - 1].fbc_val <= lp_maximums->fbc) {
Whoops. My bad.
It should still be > but ! should just be dropped.
> results->enable_fbc_wm = false;
> lp_results[level - 1].fbc_val = 0;
> }
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/dri-devel
--
Ville Syrjälä
Intel OTC
--
To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
next prev parent reply other threads:[~2013-08-09 10:04 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-08-09 9:43 [patch] drm/i915: precedence bug in hsw_compute_wm_results() Dan Carpenter
2013-08-09 9:43 ` Dan Carpenter
2013-08-09 9:58 ` Chris Wilson
2013-08-09 9:58 ` Chris Wilson
2013-08-09 10:07 ` [patch v2] drm/i915: fix a limit check " Dan Carpenter
2013-08-09 10:07 ` Dan Carpenter
2013-08-09 10:29 ` [Intel-gfx] " Ville Syrjälä
2013-08-09 10:29 ` Ville Syrjälä
2013-08-09 16:27 ` Daniel Vetter
2013-08-09 16:27 ` Daniel Vetter
2013-08-09 10:04 ` Ville Syrjälä [this message]
2013-08-09 10:04 ` [patch] drm/i915: precedence bug " Ville Syrjälä
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